Google PCA Manage implementation of cloud architecture Practice Question
This PCA practice question tests your understanding of manage implementation of cloud architecture. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is migrating a monolithic application to Google Cloud. They want to minimize changes to the application code while taking advantage of Cloud Run for serverless containers. Which approach should they take?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Cloud Run by packaging the existing application as a container and listening on a web server.
Option D is correct because Cloud Run can run any containerized application that listens on HTTP requests on port 8080. By packaging the existing monolithic application as a container and adding a lightweight web server (e.g., Express, Flask, or Nginx), the company can deploy it to Cloud Run with minimal code changes, leveraging serverless scaling and pay-per-use pricing without refactoring into microservices.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Deploy the application to App Engine standard environment with automatic scaling.
Why it's wrong here
App Engine requires specific runtime environments and may need code changes.
✗
Lift and shift the application to Compute Engine instances behind a load balancer.
Why it's wrong here
No serverless benefits, and still requires managing servers.
✗
Refactor the application into microservices and deploy each as a separate Cloud Run service.
Why it's wrong here
This requires significant code changes, not minimal.
✓
Use Cloud Run by packaging the existing application as a container and listening on a web server.
Why this is correct
Minimal changes: containerize the existing app with a web server wrapper.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that serverless containers require microservices architecture, but Cloud Run can run any containerized application, including a monolithic one, as long as it listens for HTTP requests.
Detailed technical explanation
How to think about this question
Cloud Run executes containers in a sandboxed environment based on gVisor, and each container instance must respond to HTTP requests on the PORT environment variable (default 8080) within a timeout of up to 60 minutes (with request-based scaling). The container must be stateless and can be built from any base image, allowing legacy monoliths to be wrapped with a web server like Gunicorn or Tomcat. In real-world scenarios, companies often use a 'strangler fig' pattern to gradually migrate functionality, but Cloud Run supports running the entire monolith as a single container first, then incrementally splitting services later.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Manage implementation of cloud architecture — This question tests Manage implementation of cloud architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Cloud Run by packaging the existing application as a container and listening on a web server. — Option D is correct because Cloud Run can run any containerized application that listens on HTTP requests on port 8080. By packaging the existing monolithic application as a container and adding a lightweight web server (e.g., Express, Flask, or Nginx), the company can deploy it to Cloud Run with minimal code changes, leveraging serverless scaling and pay-per-use pricing without refactoring into microservices.
What should I do if I get this PCA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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